Update validate.yaml

Author: sserrata

.github/workflows/validate.yaml

@@ -59,7 +59,7 @@ jobs:
       - uses: actions/setup-node@v4
         with:
           node-version: "18"
-      - uses: actions/cache@v3
+      - uses: actions/cache@v4
         with:
           path: |
             node_modules
@@ -79,7 +79,7 @@ jobs:
       - uses: actions/setup-node@v4
         with:
           node-version: "18"
-      - uses: actions/cache@v3
+      - uses: actions/cache@v4
         with:
           path: |
             node_modules